What's the difference betweeen D-aspartic acid and sodium D-aspartate?

is this substance converting more cholestoral into test, or just the nutrient the body needs for this conversion to take place since you need cholesteral to make testosterone?
all your questions answered if you read this thread
Testosterone Conversion Factor-1 (TCF-1) is here! D-aspartic acid supplement
Plenty of info on daa now, lots of logs out as well, I used it for 12 days and liked it, next up is 24 days during pct.